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How to use addNewDeferConstructor method of org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor class

Best Powermock code snippet using org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor.addNewDeferConstructor

Source:PowerMockExpressionEditor.java

...133             * constructor should be suppressed (which we don't know at this134             * moment of time) the parent class must have a default135             * constructor that we can delegate to.136             */137            addNewDeferConstructor(clazz);138            final StringBuilder code = new StringBuilder();139            code.append("{Object value =")140                .append(mockGetawayClass.getName())141                .append(".constructorCall($class, $args, $sig);");142            code.append("if (value != ").append(MockGateway.class.getName()).append(".PROCEED){");143            /*144             * TODO Suppress and lazy inject field (when this feature is ready).145             */146            if (superclass.getName().equals(Object.class.getName())) {147                code.append(" super();");148            } else {149                code.append(" super((").append(IndicateReloadClass.class.getName()).append(") null);");150            }151            code.append("} else {");152            code.append("   $proceed($$);");153            code.append("}}");154            c.replace(code.toString());155        }156    }157    158    @Override159    public void edit(FieldAccess f) throws CannotCompileException {160        if (f.isReader()) {161            CtClass returnTypeAsCtClass;162            FieldInfo fieldInfo;163            164            try {165                CtField field = f.getField();166                returnTypeAsCtClass = field.getType();167                fieldInfo = field.getFieldInfo2();168            } catch (NotFoundException e) {169                    /*170                     * If multiple java agents are active (in INST_REDEFINE mode), the types implicitly loaded by javassist from disk171                     * might differ from the types available in memory. Thus, this error might occur.172                     *173                     * It may also happen if PowerMock is modifying an SPI where the SPI require some classes to be available in the classpath174                     * at runtime but they are not! This is valid in some cases such as slf4j.175                     */176                return;177            }178            179            if (isNotSyntheticField(fieldInfo)) {180                String code = "{Object value =  " +181                                  MockGateway.class.getName() +182                                  ".fieldCall(" +183                                  "$0,$class,\"" +184                                  f.getFieldName() +185                                  "\",$type);" +186                                  "if(value == " + MockGateway.class.getName() + ".PROCEED) {" +187                                  "	$_ = $proceed($$);" +188                                  "} else {" +189                                  "	$_ = " + getCorrectReturnValueType(returnTypeAsCtClass) + ";" +190                                  "}}";191                f.replace(code);192            }193        }194    }195    196    /**197     * Create a defer constructor in the class which will be called when the198     * constructor is suppressed.199     *200     * @param clazz The class whose super constructor will get a new defer201     *              constructor if it doesn't already have one.202     * @throws CannotCompileException If an unexpected compilation error occurs.203     */204    private void addNewDeferConstructor(final CtClass clazz) throws CannotCompileException {205        final CtClass superClass;206        try {207            superClass = clazz.getSuperclass();208        } catch (NotFoundException e1) {209            throw new IllegalArgumentException("Internal error: Failed to get superclass for " + clazz.getName() + " when about to create a new default constructor.");210        }211        212        ClassPool classPool = clazz.getClassPool();213        /*214         * To make a unique defer constructor we create a new constructor215         * with one argument (IndicateReloadClass). So we get this class a216         * Javassist class below.217         */218        final CtClass constructorType;219        try {220            constructorType = classPool.get(IndicateReloadClass.class.getName());221        } catch (NotFoundException e) {222            throw new IllegalArgumentException("Internal error: failed to get the " + IndicateReloadClass.class.getName()223                                                   + " when added defer constructor.");224        }225        clazz.defrost();226        if (superClass.getName().equals(Object.class.getName())) {227            try {228                clazz.addConstructor(CtNewConstructor.make(new CtClass[]{constructorType}, new CtClass[0], "{super();}", clazz));229            } catch (DuplicateMemberException e) {230                // OK, the constructor has already been added.231            }232        } else {233            addNewDeferConstructor(superClass);234            try {235                clazz.addConstructor(CtNewConstructor.make(new CtClass[]{constructorType}, new CtClass[0], "{super($$);}", clazz));236            } catch (DuplicateMemberException e) {237                // OK, the constructor has already been added.238            }239        }240    }241    242    243}...

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